Now Playing: Top House Intel Democrat: Even if McCabe firing 'justified, it can also be tainted'

Now Playing: Russians head to the polls to vote, but Putin expected to easily remain in power

Now Playing: Chris Christie: 'I don't think it would be appropriate for' Trump to fire Mueller

Now Playing: {{itm.title}}

{"id":22274027,"title":"Biden and Boehner's Pre-Speech Hug","duration":"3:00","description":"The vice president and House speaker embrace before President Obama delivers his State of the Union address.","url":"/Politics/video/biden-boehners-pre-speech-hug-22274027","section":"Politics","mediaType":"default"}